Spark arrester



F. LMcGAHAN. SPARK'ARRESTER. ORIGINAL man 15M. 3. 1918.

Jan. 23, 1923.

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F. L'. McGAHAN. SPARK ARRESTER. ORIGINAL FILED JAN. 3, I918- 4 SHEETSSHEET Z.

INVENT ORI Jan. 23, 1923..

SPARK ARRESTER- ORIGINAL FILED JAN. 3, 1918- 4 SHEETSSHEET 3.

v 1,442,895. F. L. MCGAHAN. I

Jan. 23, 1923.

F. L. McGAHAN.

SPARK ARRESTER. ORIGINAL FILED mm. a. 1918.

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FREDERICK L. M GAHAN, OF LOS ANGELES, CALIFORNIA; VIOLA WALKER, ADMIN- ISTRATRIX OF SAID FREDERICK L. MGGAHAN, DECEASED, ASSIGNOR TO THE PUB- POSED MIND DEVELOPEMENT SECURITY ASSOCIATION OF THE WORLD, A TRUST COMPANY.

STARK ARRESTER.

Original application filed January 3, 1918, Seria1 No. 210,146. Patent No. 1,292,399. Divided and. this application. filed J'anuary'17, 1919. Serial No. 271,717.

T alto; hom it may concern Be it known that I, FREDERICK L.. Mo-

GAHAN, a citizen of the United. States, re-

siding at the city of Los Amgeles, in the county otLos Angeles and Statexot California, have invented certainnew and: useful Improvements in. Spark Arresters, of which the following is a specification.

This application is a division; from the application of the same inventor for patent for locomotive filed January 3, 1918,. Serial 210,1 16 which became Patent 1 ,292,391), Jan. 21 1919, and relates more particularly to the spark-arrester located in' the return part of the suction system.

In the accompanying drawings forming part of this specification, in which like numbers of reference denote like parts wherever they occur,

Figure 1 is a side elevation of the tender end of the locomotive broken away to show parts of this present invention, other parts ot which are shown in dotted lines;

Figure 2'is a sectional view on the line 2-2 of Figure 1 and shows the fire-box;

Figure 3 is a side elevation of the boiler end of locomotive showing the suction and return system;

Figure 1 is a sectional view through the turbine and fan that operate the suction system;

Figure 5 is a vertical sectional view of the exhaust-separator taken on the line 55 in Figure 7; V

Figure 6 is a plan view of the separating screen or spark-arrester;

Figure 7 is a sectional view on the line 77 in Figure 5; and

Figure 8 is a plan view of the tender illus- 40 trating the screws of the automatic fuelteed and the openings in the floor of the tender enabling the fuel to fall around the said screws.

The fire-box 1 is located in the usual relation to the cab 2, and fuel, preferably pulverized. is contained in the tender 3 having slots 41. in its floor opening into conveyors 5, containing screw conveyors 6. (See Fig. 1.)

Nozzles '7 open into the inside of fire-box 1 and are themselves integral with, or 0011- nected with pipes 8 which are in telescopic connection with pipes 9 which are connected by flexible joints 10, to conveyor housings 5. In the practice 01 the invention of this patent the screws 6 may or may not be used. It the said screws are used it will he in combination with the suction apparatus herein described. The turbine 11 is driven by steam entering it through pipes 12 leading from the exhaust chamber in the ordinary driving mechanism of locomotive; Rotation of turbine 11 continuously drives shaft 13 while the locomotive is traveling, and therewith fan 11. 7

Fan 14 thus creates a suction through the inlets 1:5 in the smohe box 56 and, through the fire tubes 54, in the fire-box 1. This suction draws fuel through nozzles 7 into the'fire-box 1 where combustion takes place, and the products of combustion, sparks, cinders, etc, are drawn from the fire-box 1. through the fire-tubes 54 into the smoke box 56 and thence into the turbine 11, through the inlets 15, into the chamber 16 ot the turbine 11 and out through the openings 17 together with the exhaust steam into the pipes 20. The sparks, cinders, etc, are separated from the steam, as hereinafter described and the steam passes through the pipes 21 and 18 to the turbine 11' which is thereby actuated as described in my Patent No. 1,292,599.

Pipe 20 contains the spark-arrester 24: (see Figs. 1, 5, and 6), which causes the stoppage of the Cinders, which are elevated and transferred to the conveyors 5, through the opening 25, whence they are either forced by screws 6 or sucked as hereinbefore described, through nozzles 7 back again into the firebox 1.

Elevator 26 is so arranged as to carry away all cinders stopped by spark-arrester 21, and to dump them into run 27, which leads to hopper 25 (see Figures 5, '7 and 1) from whence theyfall by gravity into conveyors 5.

There may be one or a plurality of conveyors 5 and the parts illustrated in connection therewith, as, for instance, in Figures 5, '7 and 8.

Having thus described this invention, I hereby reserve the benefit of all changes in form, arrangement, order, or use of parts. as it is evident that many minor changes may be made therein Without departing from the spirit of this invention or the scope of the following claims.

I claim- 1. In a locomotive, the combination of a fire-box, a source of pulverized fuel connecting therewith, having nozzles for the said fuel communicating with the interior of the said lire-box, suction means for drawing the fuel through the said nozzles into the lire-box, a rotatable member having a chamber therein, means for admitting steam into the said chamber, means for directing smoke,

' cinders, and sparks from the fire-box to and into the said chamber, means for revolving the said chambered member, thereby mixing the said smoke and steam, and means for returning the cinders and sparks to the source of fuel.

2. In a locomotive, the combination of steam producing means, driving wheels and steam actuated driving means, a turbine having steam connections With the said driving means, a separate exhaust from the maid turbine comprising an exhaust pipe, a fan for drawing products of combustion from the furnace to the said turbine, a spark-arrester located in the said pipe, said pipe having an opening located in juxta position to the said spark-arrester, a conveyor adapted to move the cinders and fuel toward the fire-box and a second conveyor adqacent to the said spark--arrester, and adapted to remove cinders therefrom through said opening and to transfer the cinders to the first named conveyor.

3. In a locomotive, the combination of a fire-box, a source of pulverized fuel connected therewith having spouts for the said fuel communicating with the interior of the said fire-box, suction means for drawing the fuel'through the said spouts into the firebox, a rotatable member having a chamber therein, means for admitting steam into said chamber, means for carrying smoke, cinders, and sparks from the fire-box into the said chamber, whereby the said chambered memher is revolved thereby mixing the said smoke and steam, and a return system to the fire-box for the cinders and sparks and to the boiler forthe steam, the said return system to the fire-box consisting of a pipe for conducting steam and cinders, a spark arrester interposed in said pipe, a conveyor in juxtaposition to the said spark arrester, the said conveyor having lifts thereon,rand a hopper fed by the said conveyor and leading to the source of fuel supply.

In testimony whereof I hereunto afiix my signature.

FREDERICK L. MoGAI-IAN. 

